The Dent CTlogger comes with a clamp on current transformer (CT) for circuit isolation. Opening: 2" or 51 mm Features & Benefits:

• Smart... Measure total consumption in accumulated running time and provides demand figures by date stamping every transition of ons and offs.
• Powerful... With storage capacity of 8,192 records.
• Windows-based software package... SMARTware software for easy data retrieval and analysis. Various analysis and graphing features with easy exporting to any ASCII format data file.
• Adjustability... CTlogger is adjustable to above 1/4 amp.
• Easy installation... Use either strong magnetic strips or Velcro (both included).
• Compact and tough... Heavy plastic case measures only 2.5 x 5 x 10 cm (1 x 2 x 4"); weighs 4 oz.
• Low cost!